void piston6(sprite_status* actionwk);
void piston6_ridechk(sprite_status* actionwk);
void piston6_init(sprite_status* actionwk);
void piston6_move(sprite_status* actionwk);
void piston6_sub(sprite_status* actionwk);
void pis6_setdata(sprite_status* actionwk, sprite_status* a1, short d0);
void piston6_side(sprite_status* actionwk);
